Building a 3D Geomechanical Model for the Fitzroy Trough

Oliver Gaede; Moritz Ziegler; Oliver Heidbach

doi:10.1080/22020586.2019.12073133

2nd Australasian Exploration Geoscience Conference: Data to Discovery

ISSN: 2202-0586
E-ISSN:

oa Building a 3D Geomechanical Model for the Fitzroy Trough
Authors Oliver Gaede^a, Moritz Ziegler^b and Oliver Heidbach^c
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^a Queensland University of Technology, 2 George St Brisbane, QLD 4000, [email protected] ^b GFZ German Research Centre for Geosciences Telegrafenberg 14473 Potsdam, , Germany, [email protected] ^c GFZ German Research Centre for Geosciences Telegrafenberg 14473 Potsdam, , Germany, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 4
DOI: https://doi.org/10.1080/22020586.2019.12073133
- Published online: 01 Dec 2019

Abstract

Summary

We present initial results from a physically self-consistent 3D geomechanical model for the Fitzroy Trough in the Canning Basin, Western Australia. Our research aims to improve the understanding of in-situ stresses in the trough, in particular the overall stress regime and spatial changes of the stress magnitudes due to basin geometry. We investigate the in-situ stresses first by utilising the classic “one-dimensional” approach to geomechanics and second by building a 3D geomechanical-numerical model. The boundary conditions of the 3D model are calibrated against stress data from wells within the trough. We show that the resulting overall stress regime is most likely strike-slip, although stress data from a small subset of wells would suggest a reverse faulting regime when considered in isolation. Further, basement depth and distance to basin boundary influence the stress magnitudes and lead to significant lateral variability of the stress magnitudes.

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References

Commonwealth of Australia (Geoscience Australia) 2019. Onshore Canning Basin. http://www.ga.gov.au/scientifictopics/ energy/province-sedimentary-basin-geology/petroleum/ onshore-australia/canning-basin (retrieved April 2019).
Gholami, R., Aadnoy, B., Foon, L. Y., & Elochukwu, H. (2017). A methodology for wellbore stability analysis in anisotropic formations: A case study from the Canning Basin, Western Australia. Journal of Natural Gas Science and Engineering, 37, 341-360.
Glanville, D.H. (comp); Balfour, N., Borleis, E., Bugden, C., Dent, V., Glanville, D.H., Hardy, D., Love, D., Salmon, M., Sambridge, M., Wallace, A. (2014). Australian Seismological Report 2013. Record 2014/45. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2014.045
Heidbach, Oliver; Rajabi, Mojtaba; Reiter, Karsten; Ziegler, Moritz; WSM Team (2016): World Stress Map Database Release 2016. GFZ Data Services, doi:10.5880/WSM.2016.001
Kennard, J.M., Jackson, M.J., Romine, K.K., Shaw, R.D., Southgate, P.N. (1994). Depositional sequences and associated petroleum systems of the Canning Basin, WA. Perth. In: Purcell, P.G., Purcell, R.R. (Eds.), The Sedimentary Basins of Western Australia: Proceedings of Petroleum Exploration Society of Australia Symposium, pp. 657-676.
Koutsabeloulis, N., & Zhang, X. (2009). 3D Reservoir Geomechanical Modeling in Oil/Gas Field Production. Society of Petroleum Engineers. doi:10.2118/126095-MS
Leonard, M., Ripper, I.D. & Yue, L. (2002). Australian earthquake fault plane solutions. Geoscience Australia, Record 2002/19.
Rajabi, M., Heidbach, O., Tingay, M., & Reiter, K. (2017). Prediction of the present-day stress field in the Australian continental crust using 3D geomechanical–numerical models. Australian Journal of Earth Sciences, 64(4), 435-454.
Parra-Garcia, M, Sanchez, G, Dentith, MC & George, AD (2014). Regional structural and stratigraphic study of the Canning Basin, Western Australia: Geological Survey of Western Australia, Report 140.
WAPIMS (2019) Western Australian Petroleum and Geothermal Information Management System https://wapims.dmp.wa.gov.au/wapims (retrieved April 2019).
Yeates, A.N., Gibson, D.L., Towner, R., & Crowe, R.W.A. (1984). Regional Geology of the Onshore Canning Basin, W.A. In Purcell, P.G. (Editor). The Canning Basin, WA. Geological Society of Australia/Petroleum Exploration Society of Australia Symposium, Perth, 1984, Proceedings, 23-55.
Ziegler, M. O., Heidbach, O., Reinecker, J., Przybycin, A. M., & Scheck-Wenderoth, M. (2016). A multi-stage 3-D stress field modelling approach exemplified in the Bavarian Molasse Basin. Solid Earth, 7(5), 1365.
Zoback, M., (2007). Reservoir Geomechanics, Cambridge University Press.

/content/journals/10.1080/22020586.2019.12073133

Article Type: Research Article

Keyword(s): Canning Basin; Finite Element Method; Fitzroy Trough; In-situ Stresses; Numerical Geomechanics

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